I mean the plot's going to be pretty basic anyway, except for some very rare occurrences. However, I think it's better beyond it just being memorable.. depending on the plot it definitely builds up to the main event better and can turn me on even more if it's a good/sexy buildup.
Ofc I don't 'watch' porn for the plot though, I will look for videos of pornstars I feel like watching at any given time.. find certain ones with keywords like "anal, lesbian, rough, dildo" whatever.. and then IF it seems like it has a nice buildup, particuilarly if it's something kinda fetishy, then I appreciate it a lot more and the "climax" is that much better, yea.
Maybe I'm an oddball though, shrug. But I'm ok with that.